Timer



E. S. RUSH.

TIMER.

APPLICATION FILED MAY 5.1919.

Patented Mar. 2, 1920.

IN VENTOR PATENT OFFICE.

ESTOL SENN BUSH, 0]? LOS ANGELES, CALIFORNIA.

TIMER.

Specification of Letters Patent.

Patented Mar. 2, 1920.

Application filed May 5v 1919. Serial No. 234,921.

To all whom it may concern:

Be it known that I, Es'roL SENN RUSH. a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Timers, of which the following is a specification.

My object is to make a timer for internal combustion engines and my invention consists of the novel features herein shown, described and claimed.

A leading feature of my invention is the construction which produces a rolling line contact.

Figure 1 is a section crosswise of the cam shaft as indicated by the line 1-1 in Fig. 2.

Fig. 2 is a diametrical section on the line 2-2 of Fig. 1.

Fig. 3 is a side elevation of the traveling member carried by the cam shaft as seen looking in the direction indicated by the arrow 3 in Fig. 1.

Fig. 4 is a sectional detail through the contact roller mounted on the traveling member, the view being taken on the lines 4-4 of Figs. 1 and 3.

Fig. 5 is an enlarged fragmentary sectional detail showing the drain for oil and dirt. the view being taken on the line 5-5 of Fig. 1 and looking in the direction indicated by the arrow.

The traveling member 1 is rigidly mounted upon the cam shaft 2. The details of the traveling member 1 are as follows:

The bearing 3 fits tightly upon the cam shaft 2 and has a slot 4 extending from its outer end and a screw 5 is inserted through the slot 4 into the cam shaft 2 to hold the bearing 3 in place. A lug 6 extends from one side of the bearing 3 and has a bore 7 parallel with the cam shaft 2.

A ivot pin 8 is rotatably mounted in the bore The lug 6 is shorter than the bearing 3 and a pivoted plate 9 fits against the outer end of the lug 6 and the pivot pin 8 extends through the pivoted plate 9 and is rigidly fixed in the plate.

A stop 10 is bent upwardly from one end of the pivoted plate 9 to engage the side of the lug 6 to limit the movement of the plate 9 in one direction.

fits against the spring seat 11. A second spring seat 13 is bent upwardly from the central portion of the pivoted plate 9 to support the outer end of the spring 12, the tension of the spring 12 being exerted to throw the pivoted plate 9 outwardly from the cam shaft 2.

A spindle 14 fits against the pivoted plate 9 and has a reduced portion 15 extending through the plate 9 and riveted to form a head 16. A key slot 17 is formed in one side of the spindle 14. A contact roller 18 is rotatably mounted upon the spindle 14 and fits ondwise against the pivoted plate 9.

A bore 19 through the roller 18 fits closely upon the spindle 14 and the end face 20 from which the bore 19 is formed fits against the inner face 21 of the pivoted plate 9.

An enlarged bore 22 extends from the bore 19 to the outer end face 23 of the roller. A spring seat 25 fits loosely upon the spindle 14 and loosely in the enlarged bore 22 and has a tongue forming a key 26 fitting loosely in the key slot 17 so as to hold the sprin seat 25 from rotating on the spindle 14 and at the same time allow the roller 18 to rotate freely upon the spindle.

An expansive coil spring 27 fits around the spindle 14 in the enlarged bore 22, the inner end of the spring 27 being attached to the inner spring seat 25 and the outer end of the spring 27 being attached to the outer spring seat 28. The outer spring seat 28 is in the form of a Washer fitting against the outer end of the spindle 14, there being a neck 29 extending from the end of the spindle 14 through the washer and riveted to form a head 30 to hold the washer in place. The spring seat 28 is large enough to support the outer end of the spring 27 and small enough to pass freely into the bore 22 so that the roller 18 may move endwise upon the spindle. The tension of the spring is exerted to move the roller 18 toward the pivoted plate 9;

The contact roller 18 has a straight central annular periphery 31, a bevel annular periphery 32 extending inwardly from the outer end of the periphery 31 and a bevel annular periphery 33 extending outwardly from the inner end of the periphery 31.

1: The traveling member 1 operates in a sta- 1 :Itionary member 34. The details of the sta- A spring seat 11 1s formed upon the bear-' tionary member 34 are ing 3 at the opposite side of the lug 6, from the stop 10. An expansive coil spring 12 as follows:

The casing is pressed from heavy sheet metal and comprises a straight annular band portion 35 and a dished web 36 having a central dent 37. An operating arm 38 ex tends outwardly from the web 36 and an oil hole 39 is formed through the web.

An insulating bearing ring 40 is preferabl formed of hard fiber. The ring 40 fits tig itly within the band portion 35 and is spaced from the outer edge of the web 36 to form the annular drain trough 41,

A bevel flange 42 extends inwardly from the ring 40 at the outer side, that is next to the drain trough 41. Dovetail recesses 43, 44, 45 and 46 are formed across the ring 40 from its inner face and extend part way into the flange 42.

Dovetail contact plates 46, 47, 48 and 4%) are inserted endwise into the recesses 43, 44, 45 and 46 and the binding posts 50, 51, and 53 are inserted through the band 35, through the ring 40 and tapped into the contact plates 46, 47, 48 and 49 and nuts 54 are applied to the outer ends of the binding posts to hold the posts in place and to hold the contact plates in place.

Insulation Washers 55 are placed under the nuts 54 to fit against the band and the holes 56 in the band 35 are large enough to insulate the band from the posts. The contact plates 46, 47, 48 and 49 have beveled faces 57 matching with the beveled flange 42 and adapted to be en aged by the bevel annular periphery 32 0% the roller 18 and the contact plates have straight faces 58 adapted to be engaged by the straight periphery 31 of the contact roller 18 and beveled edges 59 adapted to be engaged by the beveled annular periphery 33 of the contact roller, so that when the cam shaft 2 is operating and the traveling member 1 moves within the stationary member 34 there is a straight line contact between the contact roller 18 and the contact plates 46, 47, 48 and 49, said straight line being in a plane radial to the axis of the roller 18 and between the beveled periphery 33 and the beveled edge 59 and between the straight periphery 31 and the straight face 58 and between the beveled peripIhery 32 and the beveled face 63.

he face 60 of the ring 40 is beveled to matgh the, bevel 59 and inclined slots 61 are formed from the face 62 and the face 63 between the contact plates to discharge the grease, oil and dirt outwardly to the annular trou h 41. The parts are made u and all finis ed together to form the bevel face 60, the straight face 62 and. the bevel face 63 upon the flange 42 in the ring 40.

The same operation forms the bevels 57 and 59 and the straight face 58 of each contact plate so that the contact roller 18 has a perfectly smooth track. The contact between the roller 18 and the contact plates is actually a line thereby making it possible to accurately time'the make and break.

arious changes may be made without departing from thespirit of my invention as claime I claim:

1. In a timer a traveling member comprising a bearing adapted to fit upon a cam shaft, a lug extending from one side of the bearing and having a bore parallel with the cam shaft, a pivot pin rotatably mounted in the bore, a pivoted plate fitting against the outer end of the lug and fixed upon the pivot pin, a stop bent upwardly from one end of the plate to engage the side of the lug, a spring seat formed upon the bearing at the opposite side of the lug from the stop, an expansive coil spr ng fitting against the spring seat, a second spring seat bent upwardly from the central portion of the pivoted plate to support the outer end of the spring, the tension of the spring being exerted to throw the ])ivoted plate outwardly from the cam shaft. n spindle fixed in the free end of the pivoted plate parallel with the cam shaft, and a contact roller mounted upon the spindle.

2. in a timer a traveling member coinprising a bearing adapted to fit upon a cam shaft, a lug extending from one side of the bearing, a pivoted plate connected to the lug, a spindle fixed in the free end of the plate, and a contact roller mounted upon the spindle, said contact roller comprising a body having a bore in which the spindle fits and an end face fitting against the pivoted plate and having an enlarged bore extending from the first bore to the other end face of the body, a spring seat fitting loosely upon the spindle and loosely in the enlarged bore and slidingly splined to the spindle, an expansive coil spring fitting around the spindle in the enlarged bore against the spring seat, and an outer spring seat fixed upon the outer end of the spindle against the spring, and said body having a straight central periphery, a beveled periphery extending inwardly from the outer end of the straight periphery, and a beveled periphery extending outwardly from the inner end of the straight periphery.

3. In a timer a stationary member comprising a casing forming a straight annular band portion and a dished web extending from one edge of the band, an insulating rin fitting tightly in the band and spaced from the web to form a trough and having a beveled flange extending inwardly at the edge adjacent the web, there being drain openings through the insulation leading to the trough and there being dove tail recesses formed across the ring from its inner face and extending into the beveled flange, dovetail contact plates inserted end wisein the recesses and binding posts inserted through the band, through the insulating ring, and tapped into the contact plates:

4 n a timer a stationary member comprising a casing forming a straight annular band portionand a dished web extending from one edge of the band, an insulating bearing ring fitting tightly in the band and spaced from the web to form a trough and having a beveled flange extending inwardly at the edge adjacent the web, there being drain openings through the insulation leading to the trough and there being dove tail recesses formed across the ring from its inner face and extending into the beveled flange, dovetail contact plates inserted and wise into the recesses and binding posts inserted through the hand, through the insulating ring, and tapped into the contact plates, said insulatlng ring and contact plates being finished to form a straight annular inner face, a beveled annular inner face extending inwardly from one side of the straight face and a beveled annular face extending outwardly from the other side of the strai ht face.

5. %n a timer a traveling member having a contact roller spring pressed in one direction longitudinal of its axis, and a stationary member having contact plates against which the roller fits, said contact plates having central straight annular inner faces, beveled faces extending inwardly at one side of the straight faces and beveled faces extending outwardly at the other side of the straight faces, and said roller havinga straight central periphery to fit the straight portions of the contact plates and a beveled periphery at one end to fit the inwardly extending beveled contact faces of the plates, and a beveled periphery at the other end to fit the outwardly extending beveled faces of the contact plates, so that the roller contacts with a contact plate upon a line parallel with its axis.

In testimony whereof I have signed my name to this specification.

ESTOL SENN RUSH. 

